[Bug rtl-optimization/82180] assign_spill_hard_regs spills to unaligned register pair

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82180

--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 42656
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42656&action=edit
Tentative patch